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5 * additional information regarding copyright ownership.
7 * UCAID licenses this file to you under the Apache License,
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14 * Unless required by applicable law or agreed to in writing,
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22 * CURLSOAPTransport.cpp
24 * libcurl-based SOAPTransport implementation.
28 #include "exceptions.h"
30 #include "security/CredentialCriteria.h"
31 #include "security/OpenSSLTrustEngine.h"
32 #include "security/OpenSSLCredential.h"
33 #include "soap/HTTPSOAPTransport.h"
34 #include "soap/OpenSSLSOAPTransport.h"
36 #include "util/Threads.h"
39 #include <curl/curl.h>
40 #include <openssl/x509_vfy.h>
42 using namespace xmltooling::logging;
43 using namespace xmltooling;
46 namespace xmltooling {
48 // Manages cache of socket connections via CURL handles.
49 class XMLTOOL_DLLLOCAL CURLPool
52 CURLPool() : m_size(0), m_lock(Mutex::create()),
53 m_log(Category::getInstance(XMLTOOLING_LOGCAT".SOAPTransport.CURL")) {}
56 CURL* get(const SOAPTransport::Address& addr);
57 void put(const char* from, const char* to, const char* endpoint, CURL* handle);
60 typedef map<string,vector<CURL*> > poolmap_t;
61 poolmap_t m_bindingMap;
62 list< vector<CURL*>* > m_pools;
68 static XMLTOOL_DLLLOCAL CURLPool* g_CURLPool = nullptr;
70 class XMLTOOL_DLLLOCAL CURLSOAPTransport : public HTTPSOAPTransport, public OpenSSLSOAPTransport
73 CURLSOAPTransport(const Address& addr)
74 : m_sender(addr.m_from ? addr.m_from : ""), m_peerName(addr.m_to ? addr.m_to : ""), m_endpoint(addr.m_endpoint),
75 m_handle(nullptr), m_keepHandle(false), m_headers(nullptr),
76 #ifndef XMLTOOLING_NO_XMLSEC
77 m_cred(nullptr), m_trustEngine(nullptr), m_peerResolver(nullptr), m_mandatory(false),
79 m_openssl_ops(SSL_OP_ALL|SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3), m_ssl_callback(nullptr), m_ssl_userptr(nullptr),
80 m_chunked(true), m_authenticated(false), m_cacheTag(nullptr) {
81 m_handle = g_CURLPool->get(addr);
82 curl_easy_setopt(m_handle,CURLOPT_URL,addr.m_endpoint);
83 curl_easy_setopt(m_handle,CURLOPT_CONNECTTIMEOUT,15);
84 curl_easy_setopt(m_handle,CURLOPT_TIMEOUT,30);
85 curl_easy_setopt(m_handle,CURLOPT_HTTPAUTH,0);
86 curl_easy_setopt(m_handle,CURLOPT_USERPWD,nullptr);
87 curl_easy_setopt(m_handle,CURLOPT_SSL_VERIFYHOST,2);
88 curl_easy_setopt(m_handle,CURLOPT_HEADERDATA,this);
89 m_headers=curl_slist_append(m_headers,"Content-Type: text/xml");
92 virtual ~CURLSOAPTransport() {
93 curl_slist_free_all(m_headers);
95 curl_easy_setopt(m_handle, CURLOPT_USERAGENT, nullptr);
96 curl_easy_setopt(m_handle, CURLOPT_ERRORBUFFER, nullptr);
97 curl_easy_setopt(m_handle, CURLOPT_PRIVATE, m_authenticated ? "secure" : nullptr); // Save off security "state".
98 g_CURLPool->put(m_sender.c_str(), m_peerName.c_str(), m_endpoint.c_str(), m_handle);
101 curl_easy_cleanup(m_handle);
105 bool isConfidential() const {
106 return m_endpoint.find("https")==0;
109 bool setConnectTimeout(long timeout) {
110 return (curl_easy_setopt(m_handle,CURLOPT_CONNECTTIMEOUT,timeout)==CURLE_OK);
113 bool setTimeout(long timeout) {
114 return (curl_easy_setopt(m_handle,CURLOPT_TIMEOUT,timeout)==CURLE_OK);
117 bool setAuth(transport_auth_t authType, const char* username=nullptr, const char* password=nullptr);
119 bool setVerifyHost(bool verify) {
120 return (curl_easy_setopt(m_handle,CURLOPT_SSL_VERIFYHOST,verify ? 2 : 0)==CURLE_OK);
123 #ifndef XMLTOOLING_NO_XMLSEC
124 bool setCredential(const Credential* cred=nullptr) {
125 const OpenSSLCredential* down = dynamic_cast<const OpenSSLCredential*>(cred);
128 return (cred==nullptr);
135 const X509TrustEngine* trustEngine=nullptr,
136 const CredentialResolver* peerResolver=nullptr,
137 CredentialCriteria* criteria=nullptr,
140 const OpenSSLTrustEngine* down = dynamic_cast<const OpenSSLTrustEngine*>(trustEngine);
142 m_trustEngine = nullptr;
143 m_peerResolver = nullptr;
144 m_criteria = nullptr;
145 return (trustEngine==nullptr);
147 m_trustEngine = down;
148 m_peerResolver = peerResolver;
149 m_criteria = criteria;
150 m_mandatory = mandatory;
156 bool useChunkedEncoding(bool chunked=true) {
161 bool followRedirects(bool follow, unsigned int maxRedirs) {
163 curl_easy_setopt(m_handle, CURLOPT_FOLLOWLOCATION, (follow ? 1 : 0)) == CURLE_OK &&
164 curl_easy_setopt(m_handle, CURLOPT_MAXREDIRS, (follow ? maxRedirs : 0)) == CURLE_OK
168 bool setCacheTag(string* cacheTag) {
169 m_cacheTag = cacheTag;
173 bool setProviderOption(const char* provider, const char* option, const char* value);
175 void send(istream& in) {
179 void send(istream* in=nullptr);
185 bool isAuthenticated() const {
186 return m_authenticated;
189 void setAuthenticated(bool auth) {
190 m_authenticated = auth;
193 string getContentType() const;
194 long getStatusCode() const;
196 bool setRequestHeader(const char* name, const char* val) {
198 temp=temp + ": " + val;
199 m_headers=curl_slist_append(m_headers,temp.c_str());
203 const vector<string>& getResponseHeader(const char* val) const;
205 bool setSSLCallback(ssl_ctx_callback_fn fn, void* userptr=nullptr) {
207 m_ssl_userptr=userptr;
213 string m_sender,m_peerName,m_endpoint,m_simplecreds;
216 stringstream m_stream;
217 struct curl_slist* m_headers;
219 map<string,vector<string> > m_response_headers;
220 vector<string> m_saved_options;
221 #ifndef XMLTOOLING_NO_XMLSEC
222 const OpenSSLCredential* m_cred;
223 const OpenSSLTrustEngine* m_trustEngine;
224 const CredentialResolver* m_peerResolver;
225 CredentialCriteria* m_criteria;
229 ssl_ctx_callback_fn m_ssl_callback;
232 bool m_authenticated;
235 friend size_t XMLTOOL_DLLLOCAL curl_header_hook(void* ptr, size_t size, size_t nmemb, void* stream);
236 friend CURLcode XMLTOOL_DLLLOCAL xml_ssl_ctx_callback(CURL* curl, SSL_CTX* ssl_ctx, void* userptr);
237 friend int XMLTOOL_DLLLOCAL verify_callback(X509_STORE_CTX* x509_ctx, void* arg);
240 // libcurl callback functions
241 size_t XMLTOOL_DLLLOCAL curl_header_hook(void* ptr, size_t size, size_t nmemb, void* stream);
242 size_t XMLTOOL_DLLLOCAL curl_write_hook(void* ptr, size_t size, size_t nmemb, void* stream);
243 size_t XMLTOOL_DLLLOCAL curl_read_hook( void *ptr, size_t size, size_t nmemb, void *stream);
244 int XMLTOOL_DLLLOCAL curl_debug_hook(CURL* handle, curl_infotype type, char* data, size_t len, void* ptr);
245 CURLcode XMLTOOL_DLLLOCAL xml_ssl_ctx_callback(CURL* curl, SSL_CTX* ssl_ctx, void* userptr);
246 #ifndef XMLTOOLING_NO_XMLSEC
247 int XMLTOOL_DLLLOCAL verify_callback(X509_STORE_CTX* x509_ctx, void* arg);
250 SOAPTransport* CURLSOAPTransportFactory(const SOAPTransport::Address& addr)
252 return new CURLSOAPTransport(addr);
256 void xmltooling::initSOAPTransports()
258 g_CURLPool=new CURLPool();
261 void xmltooling::termSOAPTransports()
264 g_CURLPool = nullptr;
267 CURLPool::~CURLPool()
269 for (poolmap_t::iterator i=m_bindingMap.begin(); i!=m_bindingMap.end(); i++) {
270 for (vector<CURL*>::iterator j=i->second.begin(); j!=i->second.end(); j++)
271 curl_easy_cleanup(*j);
276 CURL* CURLPool::get(const SOAPTransport::Address& addr)
279 xmltooling::NDC("get");
281 m_log.debug("getting connection handle to %s", addr.m_endpoint);
282 string key(addr.m_endpoint);
284 key = key + '|' + addr.m_from;
286 key = key + '|' + addr.m_to;
288 poolmap_t::iterator i=m_bindingMap.find(key);
290 if (i!=m_bindingMap.end()) {
291 // Move this pool to the front of the list.
292 m_pools.remove(&(i->second));
293 m_pools.push_front(&(i->second));
295 // If a free connection exists, return it.
296 if (!(i->second.empty())) {
297 CURL* handle=i->second.back();
298 i->second.pop_back();
301 m_log.debug("returning existing connection handle from pool");
307 m_log.debug("nothing free in pool, returning new connection handle");
309 // Create a new connection and set non-varying options.
310 CURL* handle=curl_easy_init();
313 curl_easy_setopt(handle,CURLOPT_NOPROGRESS,1);
314 curl_easy_setopt(handle,CURLOPT_NOSIGNAL,1);
315 curl_easy_setopt(handle,CURLOPT_FAILONERROR,1);
316 // This may (but probably won't) help with < 7.20 bug in DNS caching.
317 curl_easy_setopt(handle,CURLOPT_DNS_CACHE_TIMEOUT,120);
318 curl_easy_setopt(handle,CURLOPT_SSL_CIPHER_LIST,"ALL:!aNULL:!LOW:!EXPORT:!SSLv2:!SSLv3");
319 // Verification of the peer is via TrustEngine only.
320 curl_easy_setopt(handle,CURLOPT_SSL_VERIFYPEER,0);
321 curl_easy_setopt(handle,CURLOPT_CAINFO,nullptr);
322 curl_easy_setopt(handle,CURLOPT_HEADERFUNCTION,&curl_header_hook);
323 curl_easy_setopt(handle,CURLOPT_WRITEFUNCTION,&curl_write_hook);
324 curl_easy_setopt(handle,CURLOPT_DEBUGFUNCTION,&curl_debug_hook);
328 void CURLPool::put(const char* from, const char* to, const char* endpoint, CURL* handle)
330 string key(endpoint);
332 key = key + '|' + from;
334 key = key + '|' + to;
336 poolmap_t::iterator i=m_bindingMap.find(key);
337 if (i==m_bindingMap.end())
338 m_pools.push_front(&(m_bindingMap.insert(poolmap_t::value_type(key,vector<CURL*>(1,handle))).first->second));
340 i->second.push_back(handle);
342 CURL* killit=nullptr;
343 if (++m_size > 256) {
344 // Kick a handle out from the back of the bus.
346 vector<CURL*>* corpse=m_pools.back();
347 if (!corpse->empty()) {
348 killit=corpse->back();
354 // Move an empty pool up to the front so we don't keep hitting it.
356 m_pools.push_front(corpse);
361 curl_easy_cleanup(killit);
363 xmltooling::NDC("put");
365 m_log.info("conn_pool_max limit reached, dropping an old connection");
369 bool CURLSOAPTransport::setAuth(transport_auth_t authType, const char* username, const char* password)
371 if (authType==transport_auth_none) {
372 if (curl_easy_setopt(m_handle,CURLOPT_HTTPAUTH,0)!=CURLE_OK)
374 return (curl_easy_setopt(m_handle,CURLOPT_USERPWD,nullptr)==CURLE_OK);
378 case transport_auth_basic: flag = CURLAUTH_BASIC; break;
379 case transport_auth_digest: flag = CURLAUTH_DIGEST; break;
380 case transport_auth_ntlm: flag = CURLAUTH_NTLM; break;
381 case transport_auth_gss: flag = CURLAUTH_GSSNEGOTIATE; break;
382 default: return false;
384 if (curl_easy_setopt(m_handle,CURLOPT_HTTPAUTH,flag)!=CURLE_OK)
386 m_simplecreds = string(username ? username : "") + ':' + (password ? password : "");
387 return (curl_easy_setopt(m_handle,CURLOPT_USERPWD,m_simplecreds.c_str())==CURLE_OK);
390 bool CURLSOAPTransport::setProviderOption(const char* provider, const char* option, const char* value)
392 if (!provider || !option || !value) {
395 else if (!strcmp(provider, "OpenSSL")) {
396 if (!strcmp(option, "SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION") && (*value=='1' || *value=='t')) {
397 // If the new option to enable buggy rengotiation is available, set it.
398 // Otherwise, signal false if this is newer than 0.9.8k, because that
399 // means it's 0.9.8l, which blocks renegotiation, and therefore will
400 // not honor this request. Older versions are buggy, so behave as though
401 // the flag was set anyway, so we signal true.
402 #if defined(SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)
403 m_openssl_ops |= SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION;
405 #elif (OPENSSL_VERSION_NUMBER > 0x009080bfL)
413 else if (strcmp(provider, "CURL")) {
417 // For libcurl, the option is an enum and the value type depends on the option.
418 CURLoption opt = static_cast<CURLoption>(strtol(option, nullptr, 10));
419 if (opt < CURLOPTTYPE_OBJECTPOINT)
420 return (curl_easy_setopt(m_handle, opt, strtol(value, nullptr, 10)) == CURLE_OK);
421 #ifdef CURLOPTTYPE_OFF_T
422 else if (opt < CURLOPTTYPE_OFF_T) {
424 m_saved_options.push_back(value);
425 return (curl_easy_setopt(m_handle, opt, value ? m_saved_options.back().c_str() : nullptr) == CURLE_OK);
427 # ifdef HAVE_CURL_OFF_T
428 else if (sizeof(curl_off_t) == sizeof(long))
429 return (curl_easy_setopt(m_handle, opt, strtol(value, nullptr, 10)) == CURLE_OK);
431 else if (sizeof(off_t) == sizeof(long))
432 return (curl_easy_setopt(m_handle, opt, strtol(value, nullptr, 10)) == CURLE_OK);
438 m_saved_options.push_back(value);
439 return (curl_easy_setopt(m_handle, opt, value ? m_saved_options.back().c_str() : nullptr) == CURLE_OK);
444 const vector<string>& CURLSOAPTransport::getResponseHeader(const char* name) const
446 static vector<string> emptyVector;
448 map<string,vector<string> >::const_iterator i=m_response_headers.find(name);
449 if (i!=m_response_headers.end())
452 for (map<string,vector<string> >::const_iterator j=m_response_headers.begin(); j!=m_response_headers.end(); j++) {
453 #ifdef HAVE_STRCASECMP
454 if (!strcasecmp(j->first.c_str(), name))
456 if (!stricmp(j->first.c_str(), name))
464 string CURLSOAPTransport::getContentType() const
466 char* content_type=nullptr;
467 curl_easy_getinfo(m_handle,CURLINFO_CONTENT_TYPE,&content_type);
468 return content_type ? content_type : "";
471 long CURLSOAPTransport::getStatusCode() const
474 if (curl_easy_getinfo(m_handle, CURLINFO_RESPONSE_CODE, &code) != CURLE_OK)
479 void CURLSOAPTransport::send(istream* in)
482 xmltooling::NDC ndc("send");
484 Category& log=Category::getInstance(XMLTOOLING_LOGCAT".SOAPTransport.CURL");
485 Category& log_curl=Category::getInstance(XMLTOOLING_LOGCAT".libcurl");
487 // For this implementation, it's sufficient to check for https as a sign of transport security.
488 if (m_mandatory && !isConfidential())
489 throw IOException("Blocking unprotected HTTP request, transport authentication by server required.");
493 // By this time, the handle has been prepared with the URL to use and the
494 // caller should have executed any set functions to manipulate it.
496 // Setup standard per-call curl properties.
497 curl_easy_setopt(m_handle,CURLOPT_DEBUGDATA,&log_curl);
498 curl_easy_setopt(m_handle,CURLOPT_FILE,&m_stream);
499 if (m_chunked && in) {
500 curl_easy_setopt(m_handle,CURLOPT_POST,1);
501 m_headers=curl_slist_append(m_headers,"Transfer-Encoding: chunked");
502 curl_easy_setopt(m_handle,CURLOPT_READFUNCTION,&curl_read_hook);
503 curl_easy_setopt(m_handle,CURLOPT_READDATA,in);
509 msg.append(buf,in->gcount());
511 curl_easy_setopt(m_handle,CURLOPT_POST,1);
512 curl_easy_setopt(m_handle,CURLOPT_READFUNCTION,nullptr);
513 curl_easy_setopt(m_handle,CURLOPT_POSTFIELDS,msg.c_str());
514 curl_easy_setopt(m_handle,CURLOPT_POSTFIELDSIZE,msg.length());
517 curl_easy_setopt(m_handle,CURLOPT_HTTPGET,1);
518 curl_easy_setopt(m_handle,CURLOPT_FOLLOWLOCATION,1);
519 curl_easy_setopt(m_handle,CURLOPT_MAXREDIRS,6);
522 char curl_errorbuf[CURL_ERROR_SIZE];
524 curl_easy_setopt(m_handle,CURLOPT_ERRORBUFFER,curl_errorbuf);
525 if (log_curl.isDebugEnabled())
526 curl_easy_setopt(m_handle,CURLOPT_VERBOSE,1);
528 // Check for cache tag.
529 if (m_cacheTag && !m_cacheTag->empty()) {
530 string hdr("If-None-Match: ");
532 m_headers = curl_slist_append(m_headers, hdr.c_str());
535 m_useragent = XMLToolingConfig::getConfig().user_agent;
536 if (!m_useragent.empty()) {
537 curl_version_info_data* curlver = curl_version_info(CURLVERSION_NOW);
540 m_useragent = m_useragent + " libcurl/" + curlver->version + ' ' + curlver->ssl_version;
543 curl_easy_setopt(m_handle, CURLOPT_USERAGENT, m_useragent.c_str());
546 // Set request headers.
547 curl_easy_setopt(m_handle,CURLOPT_HTTPHEADER,m_headers);
549 #ifndef XMLTOOLING_NO_XMLSEC
550 if (m_ssl_callback || m_cred || m_trustEngine) {
552 if (m_ssl_callback) {
554 curl_easy_setopt(m_handle,CURLOPT_SSL_CTX_FUNCTION,xml_ssl_ctx_callback);
555 curl_easy_setopt(m_handle,CURLOPT_SSL_CTX_DATA,this);
557 // Restore security "state". Necessary because the callback only runs
558 // when handshakes occur. Even new TCP connections won't execute it.
560 curl_easy_getinfo(m_handle,CURLINFO_PRIVATE,&priv);
562 m_authenticated=true;
565 curl_easy_setopt(m_handle,CURLOPT_SSL_CTX_FUNCTION,nullptr);
566 curl_easy_setopt(m_handle,CURLOPT_SSL_CTX_DATA,nullptr);
570 log.debug("sending SOAP message to %s", m_endpoint.c_str());
571 CURLcode code = curl_easy_perform(m_handle);
572 if (code != CURLE_OK) {
573 if (code == CURLE_SSL_CIPHER) {
574 log.error("on Red Hat 6+, make sure libcurl used is built with OpenSSL");
577 string("CURLSOAPTransport failed while contacting SOAP endpoint (") + m_endpoint + "): " +
578 (curl_errorbuf[0] ? curl_errorbuf : "no further information available"));
581 // This won't prevent every possible failed connection from being kept, but it's something.
584 // Check for outgoing cache tag.
586 const vector<string>& tags = getResponseHeader("ETag");
588 *m_cacheTag = tags.front();
592 // callback to buffer headers from server
593 size_t xmltooling::curl_header_hook(void* ptr, size_t size, size_t nmemb, void* stream)
595 // only handle single-byte data
598 CURLSOAPTransport* ctx = reinterpret_cast<CURLSOAPTransport*>(stream);
599 char* buf = (char*)malloc(nmemb + 1);
601 memset(buf,0,nmemb + 1);
602 memcpy(buf,ptr,nmemb);
603 char* sep=(char*)strchr(buf,':');
608 char* white=buf+nmemb-1;
609 while (isspace(*white))
611 ctx->m_response_headers[buf].push_back(sep);
619 // callback to send data to server
620 size_t xmltooling::curl_read_hook(void* ptr, size_t size, size_t nmemb, void* stream)
622 // stream is actually an istream pointer
623 istream* buf=reinterpret_cast<istream*>(stream);
624 buf->read(reinterpret_cast<char*>(ptr),size*nmemb);
625 return buf->gcount();
628 // callback to buffer data from server
629 size_t xmltooling::curl_write_hook(void* ptr, size_t size, size_t nmemb, void* stream)
631 size_t len = size*nmemb;
632 reinterpret_cast<stringstream*>(stream)->write(reinterpret_cast<const char*>(ptr),len);
636 // callback for curl debug data
637 int xmltooling::curl_debug_hook(CURL* handle, curl_infotype type, char* data, size_t len, void* ptr)
639 // *ptr is actually a logging object
641 CategoryStream log=reinterpret_cast<Category*>(ptr)->debugStream();
642 for (unsigned char* ch=(unsigned char*)data; len && (isprint(*ch) || isspace(*ch)); len--)
647 #ifndef XMLTOOLING_NO_XMLSEC
648 int xmltooling::verify_callback(X509_STORE_CTX* x509_ctx, void* arg)
650 Category& log=Category::getInstance(XMLTOOLING_LOGCAT".SOAPTransport.CURL");
651 log.debug("invoking custom X.509 verify callback");
652 #if (OPENSSL_VERSION_NUMBER >= 0x00907000L)
653 CURLSOAPTransport* ctx = reinterpret_cast<CURLSOAPTransport*>(arg);
655 // Yes, this sucks. I'd use TLS, but there's no really obvious spot to put the thread key
656 // and global variables suck too. We can't access the X509_STORE_CTX depth directly because
657 // OpenSSL only copies it into the context if it's >=0, and the unsigned pointer may be
658 // negative in the SSL structure's int member.
659 CURLSOAPTransport* ctx = reinterpret_cast<CURLSOAPTransport*>(
660 SSL_get_verify_depth(
661 reinterpret_cast<SSL*>(X509_STORE_CTX_get_ex_data(x509_ctx,SSL_get_ex_data_X509_STORE_CTX_idx()))
667 if (ctx->m_criteria) {
668 ctx->m_criteria->setUsage(Credential::TLS_CREDENTIAL);
669 // Bypass name check (handled for us by curl).
670 ctx->m_criteria->setPeerName(nullptr);
671 success = ctx->m_trustEngine->validate(x509_ctx->cert,x509_ctx->untrusted,*(ctx->m_peerResolver),ctx->m_criteria);
674 // Bypass name check (handled for us by curl).
675 CredentialCriteria cc;
676 cc.setUsage(Credential::TLS_CREDENTIAL);
677 success = ctx->m_trustEngine->validate(x509_ctx->cert,x509_ctx->untrusted,*(ctx->m_peerResolver),&cc);
681 log.error("supplied TrustEngine failed to validate SSL/TLS server certificate");
682 if (x509_ctx->cert) {
683 BIO* b = BIO_new(BIO_s_mem());
684 X509_print(b, x509_ctx->cert);
685 BUF_MEM* bptr = nullptr;
686 BIO_get_mem_ptr(b, &bptr);
687 if (bptr && bptr->length > 0) {
688 string s(bptr->data, bptr->length);
689 if (ctx->m_mandatory)
696 x509_ctx->error = X509_V_ERR_APPLICATION_VERIFICATION; // generic error, check log for plugin specifics
697 ctx->setAuthenticated(false);
698 return ctx->m_mandatory ? 0 : 1;
701 // Signal success. Hopefully it doesn't matter what's actually in the structure now.
702 ctx->setAuthenticated(true);
707 // callback to invoke a caller-defined SSL callback
708 CURLcode xmltooling::xml_ssl_ctx_callback(CURL* curl, SSL_CTX* ssl_ctx, void* userptr)
710 CURLSOAPTransport* conf = reinterpret_cast<CURLSOAPTransport*>(userptr);
712 // Default flags manually disable SSLv2 and SSLv3 so we're not dependent on libcurl
713 // to do it. Also disable the ticket option where implemented, since this breaks a
714 // variety of servers. Newer libcurl also does this for us.
715 #ifdef SSL_OP_NO_TICKET
716 SSL_CTX_set_options(ssl_ctx, conf->m_openssl_ops|SSL_OP_NO_TICKET);
718 SSL_CTX_set_options(ssl_ctx, conf->m_openssl_ops);
721 #ifndef XMLTOOLING_NO_XMLSEC
723 conf->m_cred->attach(ssl_ctx);
725 if (conf->m_trustEngine) {
726 SSL_CTX_set_verify(ssl_ctx,SSL_VERIFY_PEER,nullptr);
727 #if (OPENSSL_VERSION_NUMBER >= 0x00907000L)
728 // With 0.9.7, we can pass a callback argument directly.
729 SSL_CTX_set_cert_verify_callback(ssl_ctx,verify_callback,userptr);
731 // With 0.9.6, there's no argument, so we're going to use a really embarrassing hack and
732 // stuff the argument in the depth property where it will get copied to the context object
733 // that's handed to the callback.
734 SSL_CTX_set_cert_verify_callback(ssl_ctx,reinterpret_cast<int (*)()>(verify_callback),nullptr);
735 SSL_CTX_set_verify_depth(ssl_ctx,reinterpret_cast<int>(userptr));
740 if (conf->m_ssl_callback && !conf->m_ssl_callback(conf, ssl_ctx, conf->m_ssl_userptr))
741 return CURLE_SSL_CERTPROBLEM;